在某一荷载压力作用下，历时t的土层体积压缩量与主固结完成时的体积压缩量之比，称为地基土的________。
参考答案：固结度
肺结核的确诊方法为（）
A.CT
B.体层摄影
C.胸片
D.痰培养
E.动态观察
Ann is so careful that she always goes over her exercises to _______ there are no mistakes.
A．look for
B．make sure
C．find out
D．think about
